Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September correlates with a minor temperature reduction, down from August's moderately hot 82.9°F (28.3°C) to a still warm 77.4°F (25.2°C). During September, Secretary observes a consistent average nighttime temperature of 63.7°F (17.6°C).Humidity
The average relative humidity in September in Secretary is 78%.Rainfall
In September, the rain falls for 13.5 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. In Secretary, during the entire year, the rain falls for 160.2 days and collects up to 31.89" (810mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Secretary is 12h and 26min.On the first day of September, sunrise is at 6:33 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm EDT.
Sunshine
In Secretary, the average sunshine in September is 9.3h.UV index
In Secretary, Maryland, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during September leads to these advisories:
Undertake precautions - Guarding against sun damage is counselled. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What is the usual temperature for Secretary in September?
What is the average humidity in September in Secretary?
How much does it rain in Secretary in September?
When it does not snow in Secretary?
How many hours of daylight does Secretary have in September?
When is the sunrise / sunset in September in Secretary?
How many hours of sunshine does Secretary have in September?
How high is the UV index in September in Secretary?
Average temperature in September
Secretary, MD
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.8°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Secretary, MD
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Secretary, MD
- Average wind speed in September: 7.1mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Secretary, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall in September
Secretary, MD
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is July (3.43").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in September
Secretary, MD
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Secretary, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Secretary, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Secretary, MD
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Secretary, MD
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Secretary, MD
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Secretary, MD
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Secretary, MD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Secretary, Maryland, USA
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